Study on Bearing Capacity of LVL Asymmetric Truss of Lightweight Poplar Wood

Authors

  • Zeqing Wan College of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, China; State Key Laboratory of Green Building in Western China, Xi’an University of Architecture & Technology, Xi’an 710055, China
  • Yu Zhang College of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, China
  • Yan Liu College of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, China
  • Xiuyuan Fang College of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, China
  • Meng Gong Wood Science and Technology Center, University of New Brunswick, Fredericton, New Brunswick E3C 2G6 Canada

Keywords:

Laminated Veneer Lumber, Truss, Experimental analysis, Bearing capacity, Deflection

Abstract

Compared with natural wood, laminated veneer lumber has the characteristics of high strength, flexible specifications, excellent stability, and good economy. In order to study the bearing capacity of LVL trusses, the mechanical properties of LVL materials were tested. The static load test was carried out by using 3 pieces of LVL truss, and the load-deflection relationship, load-strain relationship, bearing capacity and failure mode of LVL trusses were studied. Based on the simplified joint analysis method, the metal plate connection and bolted truss were analyzed, and the bearing capacity calculation formula was developed. The results show that the upper chord instability is the main failure mode for large-span light LVL truss. A simplified formula for bearing capacity of LVL truss was proposed, and the predicted results were in good agreement with the experimental results. Finally, an application example of LVL truss engineering design and construction is briefly introduced. The research can provide technical support for the promotion and application of LVL truss of lightweight poplar wood.

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Published

2023-12-06

Issue

Vol. 19 No. 1 (2024)

Section

Research Article or Brief Communication